Multi-layer shell-core structure CoxCuyPbz alloy particle and preparation method thereof

Abstract

The invention belongs to the field of immiscible alloy particles, and particularly discloses a multi-layer shell-core structure CoxCuyPbz alloy particle and a preparation method thereof. According to the method, a solidification forming device is utilized, and the hollow CoxCuyPbz alloy particle is prepared through the reasonably-designed alloy composition proportion, the pressure of two vacuum chambers and the roller surface linear speed of a Cu roller. The prepared shell-core alloy particle is high in sphericity and smooth in surface; no breaking or hole appear in a shell-core layer; only a solidification reaction happens inside; a precipitated phase is simple; the operation process is simple; and cost is low.

Description

technical field [0001] The invention belongs to the field of immiscible alloy particles, in particular to a multi-layer core-shell structure Co x Cu y Pb z Alloy particle and its preparation method. Background technique [0002] As a common industrial raw material, metal particles have been widely used in high-tech fields such as automobiles, metallurgy, electronics, aerospace, and medicine. In particular, immiscible alloy particles have been promoted in many fields due to their superior physical and mechanical properties, and have attracted more and more attention in material preparation, becoming a hot research topic in the material science community. Among them, the immiscible Co-Cu-Pb alloy particles have good wear resistance and outstanding giant magnetoresistance effect, and are expected to be used as anti-friction materials for solid self-lubricating bearings, superconductor materials, and electrical contact materials. However, immiscible alloys often have serious...

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Problems solved by technology

These preparation technologies can better prepare layered core-shell structures, but are mainly for the preparation of nanoparticles, and cannot be used for the preparation of immiscible alloy core-shell particles, and the preparation costs are high, the process is complicated, and the equipment requirements are high. , the operation is difficult, and it is not convenient to realize the preparation of mass-produced materials, which seriously limits the industrialization of shell-core particles; and Wang Haipeng et al. successfully prepared the shell-core structure of metal alloys by using the free-fall drop tube method that simulates the space space environment, and found that The uniformity of its internal tissue has been improved, but this preparation method is more strict in simulating space conditions, and the cost of preparation is too high, which is not easy to be widely promoted

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